The 1960 is also very hard to find as many of them had very poor soldering done on the circuit board (cold solders) and faild prematurly. I bought mine in 1995 and imediatly opend up the back and resolderd all the conections that looked bad and so far its worked great but I dont need it any more so I may sell it.
Scandoublers internal or external work but can cost somewhere around $150-300 depending on what you want. External scandoublers are nice but are hard to find SoftHut had some as well as AmigaKit they are around $150. The Toastscan is the only one that works with the Video Toaster system.
